live in pacifica tonight, monte francis, nbc bay area news. >> monte, thank you. >>> and police in the east bay tonight are trying to determine the cause of death of a man who was found floating in the bay near richmond. police received a call around 3:00 this afternoon about a body in the water. homicide investigators were called in, but at this point it appears the death may have been an accident. they say the man may have slipped and fell into the water and then died. authorities have identified the body, but are still trying to contact family members. >>> the debate over same-sex marriage is headed for the supreme court this week. both sides will have their say on the federal defense of marriage act. on tuesday, justices will hear arguments on california's prop and consider whether states can stop same-sex marriage. people have been camping outside the proportionate for days to witness history. on tuesday, the court will hear a challenge to proposition 8. it defined marriage as one man, one woman. >> no evidence, none, that allowing gays and lesbians to marry harms the institution